基坑开挖与土钉墙施工过程的数值模拟

Numerical simulation of the foundation pit excavation and the construction of soil nailing wall

应用有限差分法计算程序FLAC对淮安市某基坑开挖和土钉墙施工过程进行数值模拟,分析了基坑开挖和土钉支护过程中的土体位移场、应力场和土钉受力的变化规律.数值模拟的结果与现场监测数据比较吻合,说明了使用数值方法模拟基坑开挖的有效性,得到了土钉支护基坑的位移场和土钉受力规律.

This paper applies the definite difference calculation programs FLAC to the numerical simulation of the foundation pit excavation and the construction of soil nailing wall in a Huan＇an project. It then examines the changing law of the soil displacement, stress field and the mechanical force that the soil nail bears in the process of foundation pit excavation and soil nail support. The result of numerical simulation is similar to the actual data obtained from construction, which indicates it is effective to adopt the numerical method to simulate the foundation pit excavation.